Derrick-car.



No. 719,247. PATENTED JAN. 27, 1903.

. J. A. MQMANUYS.

DERRICK GAR.

APPLICATION FILED AUG. 7, 1902. N0 MODEL.

2 8HEETS-SHEET 1.

' SHEETS-SHEET 2.

PATENTED JAN. 27, 1903.

J. A. MOMANUS. DERRICK GAR.

APPLICATION FILED AUG. 7, 1902.

X0 MODEL.

ihtrinn dtatns arnr Prion.

JOHN A. MCMANUS, OF PHILADELPHIA, PENNSYLVANIA.

DERRICK-CAR.

SPECIFIGATION formingpart of Letters Patent No. 719,247, dated January 27, 1903.

Application filed August '7, 1902. Serial No. 118,696. (No model.)

To to whom it may concern:

Be it known that I, JOHN A. MOMANUS, a citizen of the United States, residing at Philadelphia, county of Philadelphia, and State of Pennsylvania, have invented a certain new and useful Improvement in Derrick-Oars, of which the following is a specification.

My invention relates to a new and useful improvement in derrick-cars, and has for its object to provide a derrick-car which will be extremely stable and capable of lifting heavy objects and at the same time will be simple and composed of few parts, so as to be easily repaired whenever needed.

Other. objects will be detailed in the following description.

With these ends in view this invention consists in the details of construction and combination of elements hereinafter set forth and then specifically designated by the claims.

In order that those skilled in the art to which this invention appertains may understand how to make and use the same, the construction and operation will now be described in detail, referring to the accompanying drawings, forming a part of this specification, in whicl1- Figure 1 is a vertical longitudinal section through the improved derrick-car; Fig. 2, a perspective view of the upper portion of the framework of the derrick; Fig. 3, a front elevation of the derrick-car; Fig. i, a vertical section through the mast.

A represents the platform of the car.

13 represents uprights extending upward from the platform and joined together at the top by the cross-head C. The frame composed of the uprights B and cross-heads O is supported by the braces D, and upon each side of the frame are secured angular brackets E, in which is pivoted the upperend of the jacks F. One or both of these jacks may be swung out at an angle from the derrick-car, and by building up underneath the lower end of the jacks the car may be supported, so as to prevent anylateral motion. For the purpose of swinging these jacks I provide the curved straps G, which are pivoted near the lower end of the jacks and extend underneath the platform of the car and are adjustably secured to one of the cross-sills by means of bolts G passing through one of a series of holes G formed through the straps and through the cross-sill. Thus the jacks may be swung outward at an angle and held in such position.

H is the mast, which is secured at its lower end in the foot-block I, and this foot-block I is provided with a stud I, which fits within a socket J, supported at a slight distance above the platform of the car. In the upper end of the mast is secured the gudgeon K, which extends downward a distance into the mast, and around the outside of the mast at the upper end is placed a metallic tube or pipe L, which strengthens the mast at this end. A metallic cap L is placed over the upper end of the mast and encircles the upper edge of the the pipe or tube L, the gudgeon passing through the center of said cap.

M represents two sheave-wheels journaled underneath the platform of the car and extending upward therethrough. These sheavewheels may be either journaled directly on the truss-rod N or may be journaled upon a shaft secured to the truss-rod and extending between the longitudinal sills N. When a separate shaft is used, the truss-rod would only extend from the sides of the car to the longitudinal sills N, and the shaft for the sheave-wheels would then be connected to the inner ends of the trusses and extend across between the sills N. The foot-block I and also the socket J has an opening formed therethrough, and the mast H is also formed with an opening partway up from the bottom, and the cables 0 extend from the power apparatus around the sheaves N, up-through the socket J, the foot-block I, into the mast, and one of the cables then passes over a sheave-wheel P, journaled upon the outside of the mast and extendinginto the same, and this cable passes to the end of the boom Q, and is attached to the dredge or other article to be manipulated or hoisted. The other cable 0 passes around the sheave-wheel R, journaled upon the outside of the mast and ex-- tending to the interior, and then overa sheavewheel R, up along the outside of the shaft, and around a sheave-wheel S, journaled in an opening formed through the upper end of the mast, and this cable then extends to the end of the boom and is secured thereto for the purpose of raising or lowering said boom.

The boom Q is pivoted at the point Q in the foot-block I.

The gudgeon K in the upper end of the mast is journaled to the cross-piece O by means of a bearing T, through which the gudgeon passes. This bearing is bolted at the points '1" to the cross-piece and is further secured to said cross-piece by a staple U, which passes around that part of the bearing surrounding the gudgeon, and the ends of the staple pass through the cross-piece O and are secured on the opposite side by a nut and washer. Thus themast is provided with a very strong and durable bearing at the upper end; but said bearing can be easily removed or replaced with a new one at any time desired. In fact, the mast can be understepped simply by removingthe bearingTandstapleU. The opening in which the sheave-wheel S is journaled not only passes through the wooden portion of the mast, but also through the metallic pipe or tube L, which surrounds the upper end of the same, thus strengthening the mast by means of the pipe L at the weakest point in ordinary derric ks,which weakness is caused by the opening formed through. the mast in which the sheave-wheel S is located.

The advantage of my invention is that by the construction shown I am enabled to construct a derrick-car which will be comparatively simple, yet durable, and withstand all strain or ordinary work-such as excavating, hoisting, &c.and which may be easily taken apart for repair at any time, and on account of the extreme simplicity of the apparatus the cost of the derrick-car will be comparatively small.

Of course I do not wish to be limited to the exact construction here shown, as slight modifications could be made without departing from the spirit of my invention.

Having thus fully described my invention, what I claim as new and useful is 1. In combination with a truck and a platform supported thereon, a framework consisting of two uprights and a top cross-piece supported by said platform, a mast, a foot-block in which the lower end of the mast is secured, a stud formed with the foot-block, a socket secured to the platform in which the stud is stepped, a boom pivoted in the foot-block, a gudgeon secured in the upper end of the mast,

' a metallic pipe or tube surrounding the upper end of the mast, a cap fitting over the upper end of the mast and around the upper edge of the pipe or tube, a bearing in which the gudgeon is journaled, said bearing being bolted to the cross-piece of the frame, a staple passing around the bearing and through the cross-piece to further secure the same, a footblock and socket in which it is stepped provided with an opening therethrough, the mast also provided with an opening extending longitudinally upward from the lower end a short distance,two sheave-wheels M j ournaled upon the trnss-rodnnderneath the platform of the car, a sheave-wheel P journaled upon the outside of the mast and extending into an opening, two cables or chains extending from the source of power u nderneath the sheave-wheels M, up through the socket, foot-block and mast, one of the cables or chains passing over the sheave-wheel P to the end of the boom, a sheave-wheel R journaled upon the outside of the mast and extending into the opening around which the other cable passes to the outside of the mast, a guide-Wheel B through which this cable or chain passes upward to the upper end of the mast, a sheave-wheel S journaled in an opening formed through the upper end of the mast and also through the protecting pipe or tube, said last-named cable or chain passing around this sheave-wheel to the end of the boom, adjustable jacks pivoted to the upper end of the frame upon each side, substantially asand for the purpose specified. 2. In combination with a truck, a platform supported thereon, a framework arising from the truck, and jacks pivoted upon each side of said framework with a mast journaled at its lower end, in a socket supported by the platform, a gudgeon pin secured in the upper end of the mast, a removable bearing secured to the framework in which the gudgeon-pin is journaled, a metallic covering inclosing the 95 upper end of the mast, the upper end of the mast provided with an opening formed therethrough in which the upper sheave-wheel is 1ocated, said protecting-covering extending below said opening, substantially as and for 00 the purpose specified.

3. In a derrick-car, the combination of a truck, a platform supported thereon, a framework consisting of two uprights and a crosspiece arising from said platform, braces sup- I05 porting said framework, a mast journaled between the cross-piece and the platform of the car, with jacks pivoted at their upper ends to the top of the framework upon each side, curved straps pivoted to the lower end of the no jacks and adapted to extend underneath the platform of the car, said straps provided with a plurality of holes, bolts adapted to be passed through one of the holes in each strap, and

also through one of the cross-sills of the plat I15 form of the car for the purpose of securing the jacks at any angle placed, as and for the purpose specified.

In testimony whereof I have hereunto affixed my signature in the presence of two sub- 12o scribing witnesses.

JOHN A. MOMANUS.

Witnesses:

1-1. B. HALLOOK, L. W. MORRISON. 

